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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 1,002 - 1,011 (10page)
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초록· 키워드
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The hot deformation behavior of 49.2Ti-50.8Ni shape memory alloy was studied using hot compressive deformationtesting in the temperature range of 1023-1323 K and at strain rates of 0.01-10 s-1. The work-hardening rate wasinduced to analyze the stress-strain curves, and the critical stress σc and the dynamic recovery saturation stress σsatwere measured which can be specified approximately by the expressions: σsat-1.12σp and σc-0.86σp. An Arrheniusmodel was calculated to describe the relationship between peak stress and the Z parameter. The relationshipbetween deformation activation energy, the deformation conditions and the effect of Ni component in a binaryTiNi alloy on the activation energy were discussed in this work. With the help of electron backscattering diffraction,a connected mode dynamic recrystallization microstructure was confirmed in peak efficiency regimes(850 °C & 0.01 s-1 and 1050 °C & 10 s-1) of the processing map.
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